Door bell



FIG. 1 is a front elevational view of a door bell showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is another perspective view thereof;

FIG. 9 is an enlarged view of portion 9 shown in FIG. 1;

FIG. 10 is an enlarged view of portion 10 shown in FIG. 3; and,

FIG. 11 is an enlarged view of portion 11 shown in FIG. 4. 

CLAIM The ornamental design for a door bell, as shown and described. 